from django.db import models

# Create your models here.
from django.db import models

"""
ORM
>>> from apps.areas.models import Area
省
>>> Area.objects.filter(parent=None)
市
>>> Area.objects.filter(parent_id=130000)
县
>>> Area.objects.filter(parent_id=130600)

"""
class Area(models.Model):
    """省市区"""
    name = models.CharField(max_length=20, verbose_name='名称')
    parent = models.ForeignKey('self', on_delete=models.SET_NULL, related_name='subs', null=True, blank=True, verbose_name='上级行政区划')

    class Meta:
        db_table = 'tb_areas'
        verbose_name = '省市区'
        verbose_name_plural = '省市区'

    def __str__(self):
        return self.name